(BLOOMINGTON) - Police have released more details in a weekend altercation between two Indiana University students that left one with lacerations from a meat cleaver.

IU Police Department officer Gregory McClure say the two were fighting about a woman.

According to police, 18-year-old Zesen Shen, a Wright Quad resident, told police his girlfriend had gone to Indianapolis with friends and was supposed to return at 10 p.m. Saturday. She was late, and that made him mad, so he waited for her in his car outside Tulip Tree apartments. At 2 a.m., a white Audi drove up and his girlfriend got out. Shen told police he followed the car a short distance, honking his horn, then returned to an apartment at Tulip Tree, located on East 10th Street.

According to a probable cause affidavit the two men exchanged phone calls during which Shen threatened the other man. The man returned to the apartment about 3 a.m. with four others to fight Shen. So Shen got a friend, 21-year-old Kaiyu Luo to help him confront the group.

Shen, who told police he was afraid, allegedly grabbed a meat cleaver and ran after the man who had dropped off his girlfriend.

Shen allegedly hit the man with the cleaver leaving a 4-inch gash on the back of the man's lower back and two smaller cuts on his shoulder and upper arm. The man was treated at IU Health Bloomington Hospital.

Shen was charged Monday with battery resulting in injury and intimidation.. Luo was charged with felony intimidation